2020 TOYOTA PRIUS PRIME ABS

PRIUS PRIME_OM_OM47C77U_(U)
4915-5. Using the driving support systems
5
Driving
■Turning off both TRAC and VSC systems
To turn the TRAC and VSC systems off, press and hold for more than 3
seconds while the vehicle is stopped.
The VSC OFF indicator light will come on and the “Traction Cont rol Turned
Off” will be shown on the multi-information display.
*
Press again to turn the systems back on.
*: Pre-collision brake assist and pre-collision braking will also be disabled.
The PCS warning light will come on and the message will be show n on the
multi-information display. ( P. 6 6 3 )
■ When the message is displayed on the multi-information display show-
ing that TRAC has been disab led even if has not been pressed
TRAC is temporary deactivated. If the information continues to show, contact
your Toyota dealer.
■ Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assi st control will
operate:
● The shift position is in a position other than P or N (when sta rting off forward/
backward on an upward incline)
● The vehicle is stopped
● The accelerator pedal is not depressed
● The parking brake is not engaged
■ Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
● Shift the shift position to P or N
● The accelerator pedal is depressed
● The parking brake is engaged
● No more than 2 seconds have elapsed after the brake pedal is re leased.
■ Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and
hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. This sound does not indicate that a mal function has
occurred in any of these systems.
● Any of the following conditions may occur when the above system s are
operating. None of these indicates that a malfunction has occur red.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a s top.

PRIUS PRIME_OM_OM47C77U_(U)
4935-5. Using the driving support systems
5
Driving
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or s lick roads.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRAC/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC system is operating. D rive the
vehicle carefully in conditions where stability and power may be lost.
■ Hill-start assist control does not operate effectively when
● Do not overly rely on hill-start assist control. Hill-start ass ist control may
not operate effectively on steep inclines and roads covered wit h ice.
● Unlike the parking brake, hill-start assist control is not inte nded to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
■ When the TRAC/ABS/VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.

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PRIUS PRIME_OM_OM47C77U_(U)
5-5. Using the driving support systems
WARNING
■When the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the r oad condi-
tions. As these are the systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC systems off unless necessary.
■ Replacing tires
Make sure that all tires are of the specified size, brand, trea d pattern and
total load capacity. In addition, make sure that the tires are inflated to the
recommended tire inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires
are installed on the vehicle.
Contact your Toyota dealer for further information when replaci ng tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspensio n will affect
the driving assist systems, and may cause a system to malfunction.

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PRIUS PRIME_OM_OM47C77U_(U)
7-1. Maintenance and care
Clean the air intake vents and fil-
ters by the following procedures to
prevent dust from accumulating in
them, or to prevent them from
clogging.
The filters are attached to the back
side of the air intake vent grilles.
■
Cleaning the air intake vents and filters
Remove the dust from the vents
and filters with a vacuum
cleaner etc.
Clean the vents of the both
sides.
■
Cleaning the filters
If “Maintenance required for Traction battery cooling parts See
owner’s manual” is shown on the multi-information display, remo ve
the air intake vent grilles on t he both sides of the rear seat and
clean the filters.
Insert a flathead screwdriver
etc. to the notch at the edge
of the grille to disconnect the
3 tabs, and remove the grille.
Turn over the rubber portion
beside the grille to insert the flat-
head screwdriver.
To prevent damage, cover the
tip of the flathead screwdriver
with a rag.
Cleaning the air intake vents and filters
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PRIUS PRIME_OM_OM47C77U_(U)
5717-1. Maintenance and care
7
Maintenance and care
Remove the filter.
Remove dust using a vac-
uum cleaner etc. to clean the
filter.
Also, remove dust on the grille
as well as on the filter using a
vacuum cleaner.
Reinstall the filter to the origi-
nal position.
Be careful not to deform the fil-
ter or allow a gap between the
filter and the installation posi-
tion when installing the filter.
Insert the tabs at the edge of
the grille to the positions, and
push the opposite side edge
in to secure the grille.
Reinstall the grille to the original
position while turning over the
rubber portion.
Start the hybrid system and check that the warning message on
the multi-information display disappears.
It may take several minutes before the warning message disappea rs.
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PRIUS PRIME_OM_OM47C77U_(U)
5997-3. Do-it-yourself maintenance
7
Maintenance and care
Remove the reservoir cap.
Add brake fluid slowly while checking the fluid level.
Make sure to check the fluid type and prepare the necessary ite m.
■Brake fluid can absorb moisture from the air
Excess moisture in the brake fluid can cause a dangerous loss o f braking effi-
ciency. Use only newly opened brake fluid.
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4
Fluid type SAE J1703 or FMVSS No.116 DOT 3 or SAE J1704
or FMVSS No.116 DOT 4 brake fluid
ItemsClean funnel
WARNING
■
When filling the reservoir
Take care as brake fluid can harm your hands and eyes and damage
painted surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with clean
water immediately.
If you still experience discomfort, see a doctor.
NOTICE
■ If the brake fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads
wear out or when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, there may be a serious problem.

PRIUS PRIME_OM_OM47C77U_(U)
6217-3. Do-it-yourself maintenance
7
Maintenance and care
Pull the cover to disconnect the
tabs, and remove the cover.
Turn the portion to loosen
the jack, and slowly take out the
jack.
Be careful when handling the
jack, as it may become hot
depending on conditions.
( P. 619)
If the portion can not be loos-
ened, turn it using the jack han-
dle.
Taking out the jack
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PRIUS PRIME_OM_OM47C77U_(U)
7-3. Do-it-yourself maintenance
Install a new light bulb then
install the bulb base to the
light unit by inserting it and
turning the bulb base clock-
wise.
Reinstall the cover to the its original position, and attach the clip
inside of the cover.
Attach the clip on the cover,
then press the center portion
of the clip to lock.
Reinsert the cover end to the
rear bumper.
Make sure to secure the 2 tabs
on the cover end.
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